Finding the Fourth Proportional to 2,711.96, 4,068.48 and 980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.96 : 4,068.48 = 980.72 : x
2. Step 2: Convert to fraction form
   2,711.96/4,068.48 = 980.72/x
3. Step 3: Cross multiply
   2,711.96x = 4,068.48 × 980.72
4. Step 4: Simplify right side
   2,711.96x = 3,990,039.71
5. Step 5: Solve for x
   x = 3,990,039.71/2,711.96
6. Step 6: Final answer
   x = 1,471.28